Thank you for your query,
Your child is having Gastroesophagial reflux disease with Reflux esophagitis
You have to continue antireflux medication like omeprazole or lansoprazole, prokinetic drugs like domperidone or metoclopramide
and gastric mucosa
protectants like oral sucralfate.
Give small energy dense frequent feeds.
So consult your Pediatrician
or Pediatric gastroenterologist for further management.
Hope i have answered your query.